Tube expanding and beading tool.



No. 856,896. PATENTED JUNE l1, 1907.

W. MUOORMICK. 'AF TUBE EXPANDING AND BEADING TOOL.

APPLICATION FILED 00T.19.1906.

im I y somewhat nearer the tube sheet.

WASHINGTON MCOORMICK, OF HILLYARD, WASHINGTON.

TUBE EXPANDING AND BEADING TOOL.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed October 19, 1906. Serial No. 339,649.

.To @ZZ whom, it 'ln/ty concern:

Be it known that I, WAsInNGToN McCon- MIOK, a` citizen of the UnitedStates, and a resident of Hillyard, in the county of Spokane and Stateof Vasliington, have invented a new and Improved Tube Expanding andBeading Tool, of which the following is a full, clear, and exactdescription.

This invention relates to means for expanding and beading the tubes ofboilers into the tube sheet, and more particularly to cer- -tainimprovements in the tube-expanding and beading tool described andclaimed in United States Patent-No. 818,843, granted to me April 24,1906.

The object of this invention is to provide means whereby the pin may beconstructed of greater 'strength and the beading tool more centrallyarranged to eliminate the jarring effect when in operation.

A further object of the invention is to provide means whereby the toolmay be more readily controlled while in operation, and whereby it may bemore firmly held by the operator.

The invention consists in the novel features and parts and combinationof the same, which will be more fully described hereinafter and thenpointed out in the claims.

Reference is to be had to the accompanying drawings forming apart ofthis specification, in which similar characters of referenceindieate'corresponding parts in all the figures, in which Figure 1 is alongitudinal section of the expanding tool applied for expanding thetube in the tube sheet and for forming inner and outer beads Fig. 2 is atransverse section on the line 2-2 of Fig. l, Fig. 3 is a transversesection on the line 3-3 of Fig. 1; and Fig. 4 is a longitudinal sectionof the bead finishing tool as applied.

The cylindrical body portion 1 of my improved tool is substantially thesame as that disclosed in my prior patent save that a plurality,preferably two, slots 2 are provided longitudinally of the body portion,whereby a plurality of expanding and beading tools maybe simultaneouslyemployed. The tools 3 are substantially the same as those disclosed inmy patent, although they are preferably somewhat shorter at their outerends and the elastic band or ring 4 is brought The inner edge 5 of eachof the tools 3 is curved in the are of a circle, and the correspondinggrooves within the mandrel are similarly curved to fit the inner edge ofthe beading tools 3.

The outer end of the body portion 1 is provided with a hollowcylindrical flange 6 having a plurality of milled beads 7 surroundingthe same, whereby the operator may more firmly grasp the tool and morereadily turn it when in operation. The outer edge of this flange isprovided with a plurality of slots or notches 8, whereby a wrench orother suitable apparatus inay be inserted for turning the tool as thetube is being expanded.

In using the tool the parts are assembled in the relationship shown inFig. 1, and the operator grasps the milled flange 6 in one hand whileapplying a hammer to the outer end of the mandrel 9. The annular bead 10on the body portion 1 forces the inner portion of the tube outward intothe form of a bead 11, while the shoulder 12 bends over the end 13 ofthe tube against the tube sheet 111 and the ring or gasket 15, all inthe manner described in my previous patent. The work is accomplishedtwice as fast due to the use of a plurality of beading tools, and as thetube is being expanded or beaded at two different points at the sametime, it is evident that the work is done more evenly and a much moresmooth and finished appearance given to the ond of the tube. The curvedinner edge 5 of the beading tool fitting in the curved groove in themandrel 9 causes a smoother and evener contact at this point, and thejarring and rattling previously produced is entirely eliminated. Thetool is rotated as it is used and the milled flange 6 readily permits ofthis turning without the aid of any outside means, although a tool ofany suitable character may be inserted in the slots 8 should the partsbecome wedged in position. Vhen the bead 11 has been perfectly formedand the end 13 of the tube turned over against the tube sheet, anothertool 16 is inserted in place of each of the beading and expanding tools3, and by means of the flange 17 on said tools, the end 13 of the tubeis more perfectly rounded and given a more finished appearance.

`he bottoms of the recesses in the mandrel in which the expanding andbeading tools are inserted are preferably inclined as shown in Fig. 1,although they may, if desired, be arranged parallel to the axis of themandrel and terminating at a shoulder, as shown in Fig. 4. Preferably,the mandrel in connection with which the expanding tool is used IOO lIO

is as shown in Fig. l, while the mandrel in connection with which theiinishing tool is used is formed as shown in Fig. 4, although eitherform of slot may be used in connection with either type of tool.

By reason of the improvements above described, I can obtain a muchbetter iinish than is possible with the device described in my previouspatent and am able to more perfectly control the tool when in use. Thetool is of much greater strength and is less liable to become broken,all of which tends to the production of better results.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l. A tube-expanding and beading device, comprising an integral bodyformed in two diameters and having a central bore and a plurality ofslots extending lengthwise and leading to said bore, a mandrel fittingsaid bore and formed with a plurality of longitudinal recesses havinginclined bottom portions curved in cross section and registering withthe slots of the body, and a plurality of expanding and beading toolsfitting the said slots and said' recesses, and having curved inneredges.

2. A tube-expanding and beading device, comprising an integral bodyformed in two diameters and having a central bore, a slot extendinglengthwise and leading to said bore, a mandrel Jfitting said bore andformed with a longitudinal recess having an inclined bottom portioncurvedvin cross section and registering with the slot of the body, andan expanding and beading tool fitting the said slot and said recess andhaving a curved inner edge.

8. A tube-expanding and beading device, comprising an integral bodyformed in two diameters and having a central bore and a plurality ofslots extending lengthwise and leading to the said bore, a mandreliitting the said bore and formed with a plurality of longitudinalrecesses, each having an inclined bottom portion curved in cross sectionand each registering with a slot of the body, a plurality of expandingand beading tools fitting the said slots and said recesses and havingcurved inner edges, and an elastic ring tting an annular groove in saidbody and a groove in each of said tools.

In testimony whereoi I have signed my name to this speciiication in thepresence of two subscribing witnesses.

WASHINGTON MGCORMICK.

Witnesses:

E. MGINTYRE, IWI. I. TUKELL.

